Nonimmersion Pulse-Echo Acousto-Optical Imaging Nondestructive Testing System
Final rept. 30 Jun 1970-30 Mar 1973
TRW SYSTEMS GROUP REDONDO BEACH CA ADVANCED TECHNOLOGY STAFF GROUP
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The technique of Acousto-Optical Imaging AOI enables one to see, on a real-time basis, within optically opaque materials and to detect internal or surface flaws andor other irregularities which might be present. The process uses an ultrasonic beam to probe the object under study. As it interacts with the object, the ultrasonic beam acquires an acoustical picture of the object. This phase of the investigation was devoted to the design and construction of a nonimmersion pulse-echo acousto-optical imaging system. Using the nonimmersion pulse-echo acousto-optical imaging system, images of regular and irregular flaws in specimens were obtained to define the size of the smallest detectable flaw and to measure the accuracy with which depth of flaw can be determined. The report includes a description and operational characteristics of the nonimmersion pulse-echo acousto-optical imaging system.
- Test Facilities, Equipment and Methods